Table 2: Indices used to assess plaque accumulation and marginal mucosal conditions around oral implants according to Mombelli et al. [9].

Indices to assess plaque accumulation

(0) No detection of plaque
(1) Plaque only recognized by running a probe across the smooth marginal surface of the implant
(2) Plaque can be seen by the naked eye
(3) Abundance of soft matter

Indices to assess marginal mucosal conditions

(0) No bleeding when a periodontal probe is passed along the mucosal margin adjacent to the implant
(1) Isolated bleeding spots visible
(2) Blood forms a confluent red line on mucosal margin
(3) Heavy or profuse bleeding